Question

In the formation of a rainbow, what acts as tiny prisms?

Answer 1

Answer:

The water droplet act as the prism. You cant say they are prism cuz prism involves deviation of light whereas these tiny droplet of water show total internal reflection.

Answer 2

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A rainbow is an excellent demonstration of the dispersion of light and one more piece of evidence that visible light is composed of a spectrum of wavelengths, each associated with a distinct color. Each individual droplet of water acts as a tiny prism that both disperses the light and reflects it back to your eye.